STONE KLEEN is a highly concentrated neutral pH scrubbing cleaner designed specifically for daily use in automatic scrubbers. It is safe and effective on all stone surfaces: Marble, granite, limestone, onyx, terrazzo, travertine, flagstone, sandstone, slate, clay tile, Saltillo tile, terra cotta, quarry tile, cantera, ceramic tile, pavers, grout, agglomerate and masonry surfaces. It is also excellent for damp mopping on polished marble surfaces where frequent re-polishing by the crystallization method is performed.